Canadian passenger Leonard Cecil Parkes was an electronics and communications expert and a civilian RCAF employee at the time of his death. Parkes emigrated from England to Canada in 1916 but later went to the USA where he enlisted in the United States Marine Corps, May 21, 1923. He worked in communications for four years in the USMC before returning to Canada in 1927. He had various civilian positions in communication at the Canadian Marconi Company and at radio stations in Toronto and Sudbury until he joined the RCAF in April 1940 and worked as an instructor at British Commonwealth Air Training Program (BCATP) wireless training schools in Calgary, Alberta (No 2), Montreal, Quebec (No 3) and Guelph, Ontario (No 4). During his time at No 4 school in Guelph, he also would be gone for periods of time, revealed later as having been working at working at the "Secret" Special Training School No 103, Camp X on the "Hydra Wireless Installation". Camp X was situated between Oshawa and Whitby, Ontario
Leonard Cecil Parkes attained the rank of Squadron Leader before leaving the RCAF. After the war Parkes returned to working at a Toronto radio station before being called back to service with the RCAF as a civilian working on radio communications